DuraVent DuraTech LDC Wall Thimble: a sleeve for the chimney’s path through a wall
The DuraVent DuraTech LDC Wall Thimble is a three piece sleeve that lines the wall opening around a chimney. It keeps a 2 inch air space between the pipe and materials that can burn, including framing, insulation, and siding. That space must stay empty. The sleeve fits between standard studs and slides to suit walls 4 to 10 inches thick. A custom made extension can bridge the pieces for walls up to 16 inches thick. Chimney pipe passes horizontally through it, not stovepipe. DuraTech LDC is DuraVent’s large diameter chimney, an insulated double wall pipe made in 10 to 24 inch sizes for big fireplaces, furnaces, and boilers.
Choose a 10, 12, 14, or 16 inch diameter to match your chimney. The room side has a black painted trim plate. DuraTech LDC parts work only with that same system, not smaller DuraTech, DuraChimney II, or another brand. Need support at the tee? See the DuraVent DuraTech LDC Tee Support Bracket, a chimney support at the tee. The DuraVent DuraTech LDC Wall Thimble ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.

















































